from flask import Flask

from config import Config

from .cli import register_cli_commands
from .errors import register_error_handlers
from .extensions import db, login_manager
from .routes import register_routes
from .utils import asset_url, init_version, init_database_with_retry


def create_app():
    app = Flask(
        __name__,
        template_folder="templates",
        static_folder="static",
        static_url_path="/static",
    )

    app.config.from_object(Config)

    db.init_app(app)
    login_manager.init_app(app)
    login_manager.login_view = "zaloguj"

    init_version(app)

    @app.context_processor
    def inject_asset_helpers():
        return {"asset_url": asset_url}

    @app.before_request
    def ensure_db_ready_before_request():
        if app.extensions.get("database_ready") is True:
            return None
        init_database_with_retry(app, max_attempts=1, delay=0, raise_on_failure=False)
        return None

    register_routes(app)
    register_error_handlers(app)
    register_cli_commands(app)

    return app